Portable service station mounted on a vehicle



Feb. 21, 1950 J. H. ADLER 2,498,229

' PORTABLE SERVICE STATION MOUNTED ON A VEHICLE Filed July 9, 1948 8 Sheets-Sheet 1 Inmentor JMaflAd/er attorney Feb. 21, 1950 J. H. ADLER 2,498,229

v "PORTABLE SERVICE STATION MOUNTED ON A VEHICLE Filed July 9, 1948 8 Sheets-Sheet 2 :mvcntor Q folln fiAdZer Feb. 21, 1950 J. H. ADLER 2,498,229

v PORTABLE' SERVICE STATION MOUNTED ON A VEHICLE Filed July 9, 1948 8 Sheets-Sheet 5 Q I J -i l 'TH Q I @T Feb. 21, 1950 J. H. ADLER. 2,498,229 PORTABLE SERVICE STATION MOUNTED ON A VEHICLE m "WL ""11.

Feb. 21, 1950 J. H. ADLER 2,498,229

PORTABLE SERVICE STATION MOUNTED ON A VEHICLE Filed July 9, 1948 I 8 Sheets-Sheet 5 Zhwentor Feb. 21, 1950 J. H. ADLER 2,498,229

PORTABLE SERVICE STATION MOUNTED ON A VEHICLE Filed July 9, 1948 8 Sheets-Sheet 6 Zmnentor (Ittorneg 8 Sheets-Sheet 7 J. H. ADLER PORTABLE SERVICE STATION MOUNTED ON A VEHICLE W Inn.

Feb. 21, 1950 Filed Jul 9, 1943 J knHAJ/er (Iflomeg Feb. 21, 1950 J. H. ADLER 2,498,229 4 PORTABLE SERVICE STATION MOUNTED ON A vE H;cL E Ffiled July 9, 1948 Q s Sheets-Sheet s 3m entor John EA ler' Patented Feb. 21, 1950 John H. Adler, Pittsburgh, -Pa.,-asaignor to Jan.

Inc., Pittsburgh, syivania Pa a corporation of Penn- Applieation July 9, 1948, Serial No. 37,738

locum. (craze-12s) This invention relates to a portable service station mounted on a vehicle, or what may be termed a service-station-on-wheels, for dispensing various products, such as lubricants (including greases and oils), fuels of the hydrocarbon family. coolants (including antifreeze) and air for tire inflation or for pneumatically operated tools and the like. The present application is a continuation-in-part of my copending application Serial No. 715,047, filed December 9, 1946, entitled Portable service station, now abandoned.

A common way for providing service to vehicles in the field or at remote points from a permanent gas station is to load a plurality of drums of oil, gasoline, grease, etc., on a truck, each drum commonly having an air motor or pump unit connected to the top thereof, and to transport them to such remote points for dispensing their contents. An outstanding disadvantage of such procedure is that when these drums are emptied, it becomes necessary to unscrew the air motor fittings and to ship back the empty drums for refilling or replacement by filled drums of oil, gasoline, grease, or the like, thereby requiring substantial time and labor for the handling and transportation of the drums, as well as causing excessive wear of the air motor fittings as the result of frequent unscrewing and screwing thereof, causing loss of air pressure and products and ultimately requiring replacement of these fittings or air motor units.

Another disadvantage of such drums is the they are usually heavy and bulky, thereby occupy considerable space and add appreciably to the weight of the load carried by the truck. Furthermore, when carried on the truck platform, they are quite elevated from the ground, that is, their centers of gravity are rather high, thereby minimizing the mobility of the truck through rough fields due to the tendency of the drums to overturn or upset.

Another disadvantage in such use of drums is that, in practice, there is a tendency for the driver to await emptying of all or most of the drums before hauling them back to the supply station for refilling or replacement. As a result, there will be a number of empty drums on the truck at all times, which not only unnecessarily add to the weight, but take upvaluable space and are unsightly.

Broadly stated, my invention comprises a vehicle, such as a trailer (or self-propelled vehicle), having permanent tanks and individually removable and replaceable tanks forming integral parts of the trailer chassis for storing service station products, such as oil, grease, water, compressed air, and the like, thereby lowering the center of gravity of the mass of such products and increasing the mobility of the vehicle through rough terrain. The invention also involves an optimum disposition of products-dispensing hose reels and other auxiliary parts necessary for providing eflicient and flexible dispensing of various products and to enable quick servicing of several vehicles simultaneously while out inthe field, as well as to enable easy and quick replacement or supply of the products as they are used.

An object of the present invention is to provide a novel portable service station which is devoid of the above-named disadvantages of drum carrying trucks commonly used in the art.

A more specific object of this invention is to provide a vehicle having permanently mounted tanks or receptacles thereon as integral parts of the chassis, together with auxiliary equipment necessary for an efilcient and flexible dispensation of oil, gas, water, compressed air for tire infiation, and other service products normally provided by permanent service stations.

A still more specific object of this invention is to provide a mobile service station having a chassis reinforced or cross braced by a plurality of tanks, having low centers of gravity by 'suspending them on cross frame members extending at right angles to longitudinal frame members and serving as integral parts of the chassis, which tanks are readily detachable from said cross frame members for facilitating repair or replacement.

A still further object of this invention is to water, etc., under pressure selectively from either side of the vehicle or from both sides simultaneously.

A still further object of the invention is to provide a mobile service station wherein the dispensing equipment and power source are disposed on a trailer in a novel manner and their loads distributed so as to greatly improve the ridj qualities of the vehicle, providing a hammocklke suspension.

1A still further object of this invention is to ovide a portable service station on a drawn ve- I- cle wherein permanent connections are proded for dispensing various products from tanks uilt into the vehicle and wherein the vehicle is self-contained, carrying its own power sources to make the vehicle self-sumcient and independent of the necessity of external sources of power for dispensing the products, and wherein the same power source (compressed air) used for dispensing the products is alternately used for refilling emptied or partly emptied tanks permanently mounted on the vehicle.

Other objects and advantages of the present invention will become apparent from a study of the following specification taken with the accomp ylng drawings wherein:

Fig. l is a side elevational view of a trailer embodying the principles of the present invention;

Fig. 2 is a top or plan view of the trailer shown in Fig. 1;

Fig. 4 is an enlarged top or plan view of the front portion of the trailer shown in Figs. 1 and 2 and showing fuel dispensing equipment;

Fig. 5 is an enlarged top or plan view of the central portion of the trailer shown in Figs- 1 and 2 and showing grease and oil dispensing equipment; a

Fig. 6 is an enlarged side view ofthe structure shown in Fig. 4;

Fig. '7 is an enlarged side view partly in crosssection, of the structure shown in Fig. 5;

1 Fig. 8 is an enlarged transverse cross-sectional view of the trailer looking towards the rear, and

, Fig. 9 is a rear view of the trailer.

Referring more particularly to Figs. 1 and 2 of the drawings, there is shown a trailer comprising a pair of rear wheels 2 and a pair of front wheels 3. The front wheels are vertically retractable in a telescopically fitting frame member 4 in a well known manner to permit raising of the front wheels 3 when the trailer is being pulled or hauled by means of a truck or tractor which is attached tov the trailer by means of a hitch connected to hitching post 5.

An outstanding feature of the present invention resides in lowering of the center of gravity of as much of the load carried by the trailer as possible, that is, both the permanent frame parts of the trailer as well as the permanent liquid carrying tanks. As will be more apparent from an inspection of Fig. 3, the frame or chassis denoted generally by numeral 6 has a front portion 8a and a rear portion 6b interconnected by a gooseneck or inclinedframe portion 30 whereby the rear portion is located at an elevation substantially below that of the front portion so as to lower the centers of gravity of a plurality of tanks 3, 3, l0, II and I2 suspended on the rear portion. These tanks may store oil, grease or other lubricants. A tank i3, preferably for storing-water, is mounted at the top of the gooseneck portion 3c. The tanks extend crosswise between two longitudinally running channels or channel-shaped frame members It and of the chassis structure, as shown more clearly in Fig. 2. The tanks 8 to l2, inclusive, have covers it to 20, inclusive, respectively, which may be interlocked by means of a locking rod 2| extending through registering apertures formed in the respective covers. Each of the tanks has mounted thereon Fig. 3 is a longitudinal cross-sectional view of the'chassis of the trailer shown in Figs. 1 and 2;

an air pump for pneumatically pumping out liquid contained in the tank to levels higher than the tank or at pressures greater than that obtained by gravity flow. Such air motors or pumps for tanks 3 to l3, inclusive, are denoted by numerals22 to 26, inclusive, respectively, and are of a construction well known in the art, having an air motor pump unit located at the top thereof and a long tubular part immersed in the liquid contained in the tank through which liquid is drawnor pumped.

Each of the individual tanks 8 to l3, inclusive, is suspended crosswise of the longitudinally running frame members l4 and I5 by means of a pair of angle-shaped suspending strips, such as 21 and 28, welded on opposite sides of tank 9, for example. These suspending strips are supported on the top flanges of cross braces or frames v to 34,.inclusive. For instance, tank 3 is supported on cross braces 30 and 3|. The ends of the cross braces are welded or brazed inside of opposing web portions of frame members It and I5. By

, suspending the tanks in this manner, they can be individually removed and replaced very quickly either for repair purposes or replacement. Oftentimes, a single tank may develop a leak, in which case it is a simple matter to quickly remove the individual tank without disturbing the remainder of the tanks. It will be noted that a substantial portion of the respective tanks 8 to i3, inclusive, extend below the supporting framework, thereby considerably lowering the center of gravity of the tanks and their contents. Even the gooseneck portion 6c of the chassis has supporting strips for supporting one side of tank 8 and one side of tank l3. Since the tanks 8 to l3, inclusive, are rigidly secured to and extend clear across the longitudinally extending frame members l4 and I5, they themselves serve as cross braces for aiding the conventional cross braces 30 to 34, inclusive, in cross bracing the frame structure or chassis, thereby providing a relatively stiff, laterally reinforced chassis structure. Thus the amount of normal cross bracing required by the braces 30 to 34, inclusive, is substantially reduced, thereby minimizing the cost as well as weight of the complete chassis. Since the suspended tanks 8 to I3, inclusive. are located centrally of the trailer, the riding qualities of the trailer are considerably improved, particularly in view of the substantial lowering of the centers of gravity of the tanks as compared to ordinary tanks which are normally supported on top of truck or trailer platforms.

In order to supply air pressure to the various air pumps 22 to 26, inclusive, a compressor tank unit is provided within a housing 36, which unit includes a compressor tank and a, gasoline driven motor therefor of any well known construction. Air under pressure is supplied through shut oi! valve 31 and pipe 38 to a longitudinally extending air supply manifold 39 which is connected by means of branch pipes 40 to 44, inclusive, to the respective air pumps in the air pump units 22 to 26, inclusive, respectively (see Fig. 5). Each of the branch pipes has a pressure regulating valve, such as 40a, and a pressure gauge, such as 40b, connected to branch pipe 40. Thus the air pres sures to the various air pumps may be regulated and visually observed. Oil lubricators, such as 400, are also provided (see Fig. '7). Liquid lubricant, under pressure, is pumped out of the respective air pumps 22 to 26, inclusive, through 1' connections connected to outlet branch pipes ll to 43, inclusive. Pipe 43 feeds a pair of reels I2 and I3; pipe 41 feeds .a pair of reels I4 and llpplpe 40 feeds a pair of reels and I1, and pipe 40 feeds a pair of reels 0.0 and 00.

Platforms 02' and 03' upon which the various reels are supported provide a hammock-like support, and have a slight lateral swing simulating a hammock and enhancing the riding qualities of the trailer.

Air under pressure is also fed to water tank I0 through branch'pipe 0| (see Fig. 4) and shut off valve 02. The air pressure is regulated by pressure regulating valve 00 and is indicated by pressure gauge I2. A safety valve I0 is also-provided. Water under pressure flows outwardly of the tank through pipe 00 which, through-a 1' connection, feeds pipe 04 and the pair of water dispensing reels 05 and 00.

Air under pressure is also fed from manifold 30 through branch pipes 61 and 08 to a pair of tire inflating reels 69 and 10, respectively.

A fire extinguisher 'Il may be conveniently placed between groups of reels on platform 02. I

Thus, as described hereinabove, for each type 'of oil or grease, there are duplicate outlets through reels located on opposite sides of the trailer. Likewise, there are duplicate hose reels for dispensing water as well as for dispensing air along opposite longitudinal sides of the trailer. This enables simultaneous servicing of two cars or trucks located on opposite sides of the trailer or the selective servicing of either of them. Similarly, other liquids or fluids may be simultaneously dispensed on opposite longitudinal sides of the trailer so as to service vehicles in half the normal time required.

At the front of the trailer there is supported a large fuel tank 13, preferably compartmented by partitions I4 and 15, for storing gasoline, Diesel fuel, or other liquid fuel, or liquids, particularly those of the hydrocarbon family. The respective compartments have at the top thereof cover plates I6, 11 and 18 for covering inlets through which liquid fuel may be introduced for supplying the tank 13. Two separate pump means are provided for supplying liquid fuel to the compartments in tank 13, one for the central compartment and one for the interconnected outer compartments. Pipe 82 interconnects the outer compartments through a shut off valve 03 (see Fig. 4) By closing the valve, different fuels may be supplied to the outside compartments. By opening it, the liquid level of the same fuel in the outside compartments will be maintained .the same, thereby equally distributing the load.

These two separate pump means are connected to the compressor tank unit and are in the form of Xmas tree connections and pump units 00 and II which will be described in detail hereinafter. Supported on opposite platforms 84 and 05 in the front portion of the trailer are a pair of hose reels I0 and 81 connected to pump unit 00 through pipes as and 80, respectively, and each provided with a suitable dispensing nozzle, such as 00a, Each of the Xmas tree pump units, such as 00, comprises an air motor 90 and a fuelpump 0i driven thereby, which pump serves the purpose of pumping liquid fuel to the respective dispensing hose reels 86 and 81. The supply of fuel to the hose reels 86 or 81 through pipes 80 and I! may be cut oil by means of cut-oil. valves 02, and 03, respectively (see Fig. 6). An additional cut-on valve 94 is provided for the purpose of pumping fuel into tank 13 for refueling the tank when necessary. Such refueling is accomwhich hose may be immersed in a fuel supply barrel or tank and by connecting another hose to the pipe connection 00 after the plug on such connection is removed and leading the latter hose through one of the inlets normally closed by cover plates I0, I1 and I0. Valves 02 and 93 are closed during this time and valve 04 is open 'so that the pump will pump fluid from the external source, through the vertically extending pipe 00 to the hose connected to the pipe connection 00, thence through a hose to the top of the tank II. The air supply pipe to each air motor includes a pressure regulating valve, such as 01, so as to enable varying of the pressure supply to the air motor, and a pressure gauge, such as 00, for indicating the pressure.

A suitable identical Christmas tree pump unit II is provided for pumping liquid fuel from the outer interconnected compartments through pipes IOI and I02 to dispensing reels I00 and I04, respectively. Dispensing nozzles, such as I03a, are provided on these reels. Pump unit II, similar to pump unit 80, may, by selective control of the associated valves, selectively pump fuel from the outer compartments to hose reels I03 and I04, or from an external source of supply to the outer compartments by applying suitable hose connections, similar to those for pump unit 00.

Since the outer compartments of the tank II are smaller in capacity than the central compartment, a convenient arrangement is to store Diesel fuel in the outer compartments and gasoline in the central compartment. However, these may be interchanged if so desired. Other liq-'- uids, such as flre extinguishing liquid, may be stored.

A moisture fllter I06 is connected between the air supply manifold 39 and the air supply lines leading to the respective air motors of pump units 00 and II for the purpose of draining out moisture and water that is contained in the line and that might otherwise be injurious to the operation of the air motors. Such fllter may be of any well known construction. Thus the air going to the respective rotary motors in the two Xmas tree connections is free of moisture and thereby will insure optimum performance of these motors. A drain connection I0! is provided to drain water which may collect in the air supply manifold as well as that discharged "from the moisture filter I08.

At the rear of the trailer there are disposed a plurality of compartments H0, III and H2 which are supported between longitudinal frames I4 and I5 and are integrally formed as part of the chassis. These compartments may be used for storing oils or greases and have caps H3, H4 and II! which may be locked together by a rod H0. The various tanks are connected by means of branch pipes H1, H8 and I19 to a common air supply pipe I20 having a valve connection I2I similar to that on a tire inflating hose and which may be pressured by means of an external air source. More specifically, air from the tire inflating reels 09 or 10 may be applied to valve I2I so as to place the liquid under pressure in tanks 0, III and H2, which liquid is dispensed spectively, controlled by shut off valves I26, I21 and I20, respectively. The liquid is dispensed through a common outlet or faucet I29. These tanks, therefore, act as additional supply units in wh ch liquids are dispensed by gravity. If the trailer is inclined, an external source of air may some be applied to valve ill to assist in dispensing the P oducts.

Extending from the air compressor unit It (see Fig. 1) is a hose coupling iii, a regulating valve I32, a pressure indicator I, and a shut off, valve I34. Thus air under pressure may be supplied to any external device, particularly pneumatic tools, such as impact wrenches, air hammers, or in fact, any pneumatically operated tool or machine, the pressures of which may be regulated by the valve I32. Thus the trailer assembly is extremely useful on farms and other remotely situated places as a source of pneumatic power.

At the rear of the trailer, as shown more clearly in Figs. 2, 8 and 9, there are disposed rearmost' tanks or compartments I31 and I38 extending between longitudinal frames is and It for storing tools or accessories. In addition, the remaining spaces or compartments I38 and I40 at the extreme rear may be used for tools, gloves and other accessories. More specifically, doors for compartments I39 and I40 are pivotally mounted along their lower edges to the back of the trailer and may be held in an erect position by pins ill and I42, respectively. After the pins are inserted into holes formed along the inner side edges of the respective doors, the door of a central compartment I43 pivotally mounted along the bottom edge is swung into a vertical position and may be locked into such position by a padlock I. when the door is so locked, it will conceal pins ill and I42, which pins serve to lock the outside doors, hence there will be no necessity for locking such doors. In other words, the single lock I serves to lock all three pivoted doors.

At the to of the trailer there is disposed a somewhat parabolic -shaped framework 6 used for supporting a canvas protective cover for covering the entire trailer or a substantial portion thereof to protect it from rain, snow and, to some extent, cold weather. A ladder I" is provided for mounting the tank 13 such as during refueling of such tank.

Thus it will be seen that I have provided a very efiicient and extremely useful trailer assembly which serves as a portable service station for servicing vehicles in the field, such as vehicles engaged in construction work, army vehicles, farm vehicles and the like; furthermore, such service station is unique in that it has identical dispensing reels disposed on opposite sides thereof to enable simultaneous servicing of two vehicles located along each side of the trailer. Furthermore, in addition to service station equipment and liquids, such as gasoline, Diesel fuel, oil, grease, antifreeze, and the like, the trailer has mounted thereon a source of pneumatic power in the form of a compressor unit for supplying air under pressure to pneumatically operated tools and machinery. Moreover, the compartments of the trailer are permanently built into the trailer and many of them are individually replaceable so as to provide a permanent frame construction in which the compartments are so disposed as to considerably improve the riding qualities of the vehicle, their centers of gravity being extremely low and the compartments being centrally located along the entire length of the trailer, making it readily portable and giving it excellent ridin qualities, even over the roughest terrain and around curves at relatively high speed.

While the above construction has been described in connection with a trailer unit, it should be noted that, if desired, a self-powered truck can be .used instead, inwhich case the front portion of the trailer would have added thereto the normal front portion of a truck, which while probably lengthening the structure, makes its self-contained unit useful for many purposes. Furthermore, the hose reels; which are mounted on opposite platforms or running boards of the central part of the trailer unit are disposed somewhat in the form of a hammock and hav riding qualities which simulate somewhat that of a hammock in that there is a somewhat lateral swinging movement of the central part of the trailer assembly which gives great comfort in riding.

While I have illustrated and described a certain embodiment of my invention, it will be understood that this is by way of illustration only, and that various changes and modifications may be made within the contemplation of my invention and within the scope of the following claims.

I claim:

1. A trailer chassis comprising a pair of longitudinally extending frames, the front end portions of which are at a higher level than the rear end portions, there being a gooseneck-like integral connection between said portions, a plurality of cross braces integrally connected with and extending in spaced parallel'relation crosswise of said frames, and a plurality of tanks extending transversely of said frames and directly supported by said cross braces so as to become a part of the cross framing, each of said tanks having supporting means integrally extending from the upper portions of the side walls thereof intermediate their height and directly supported by the flanges of said cross braces, therefore being readily detachable and replaceable and whereby a substantial portion of the height of said tanks depends below said cross braces.

2. A trailer comprising a chassis having two longitudinally extending frames of channelshaped cross-section, the flanges of which extend toward each other in confronting relationship, a

substantial length of the rear portions of said frames being disposed at a height substantially below that of the front portions so as to lower the centers of gravity thereof, a plurality of laterally extending cross frames connected to said rear portions and disposed in spaced parallel relationship and the ends of which are integrally secured to the web portions of said longitudinally extending frames, and a plurality of tanks having ribs welded to the upper portions of opposite longitudinal sides thereof intermediate their height directly supported by the top flanges of said cross frames for individually supporting in a readily detachable manner each of said tanks so as to form part of the chassis, and whereby a substantial portion of the height of said tanks depends below said cross frames, thereby increasing the mobility of the trailer.

3. A trailer comprising a pair of rear wheels, a pair of front wheels which are vertically adjustable, a hitch connection at the front for attachment to a truck for the purpose of drawing the trailer, a pair of longitudinally extending frames forming the longer portions of the trailer chassis and having gooseneck-like front portions integrally extending at a level higherthan said longer portions, said frames being of channel-shaped cross-section and having confronting fiange portions, a plurality of cross braces extending between said frames in spaced parallel relationship, a plurality of rectangularly-shaped tanks having supporting strips welded on opposite sides thereof intermediate their height for support by the top flanges of said cross braces, thereby making the tanks individually detachable and replaceable and whereby the tanks themselves extend below said frames and form an integral part of the cross bracing structure of the chassis to impart substantial rigidity transversely of said frames, and an ad itional tank detachably mounted on the goosencc: portion of said longitudinally extending frames, a substantial length of said tank extending below the point of support,

4. In a trailer tank vehicle for dispensing gasoline service station products, a chassis including a pair of longitudinally extending frame members, a plurality of separate tanks extending across and depending between said frame members, each of said tanks having mounted thereon a pump unit operated by an air motor, a source of compressed air mounted on said vehicle, an air supply manifold extending longitudinally of said chassis and connecting said source to said respective air motors for applying motive power to operate said pump units without exposure of the liquid in the tanks to said compressed air, a plurality of hose reels mounted on said vehicle, each connected to the outlet of one of said pump units and having a dispensing spigot at the end thereof, whereby any of the various liquids in said tanks may be selectively dispensed.

5. A vehicular trailer for dispensing service station liquids, including a chassis, a plurality of separate, permanent tanks rigidly and detachably mounted on said chassis and extending transversely thereof, each of said tanks having mounted thereon a pump unit including an air motor for motivating the respective pump unit, a source of compressed air mounted on said trailer, an air supply manifold extending longitudinally of said chassis and connecting said source with said respective air motors without exposure of the liquid in the tanks to said compressed air, longitudinally extending platforms along each side of said chassis and simulating mudguards, a plurality of pairs of hose reels supported on said platforms, a hose reel of each pair being mounted on opposite platforms, and valve means for selectively dispensing liquid under pressure from either or both of any of said pairs of hose reels, whereby two vehicles on opposite sides of the trailer may be simultaneously serviced.

6. In a trailer tank vehicle for dispensing gasoline service station products, a chassis including a pair of longitudinally extending frame members, spaced parallel cross frame members connected between said longitudinally extending frame members, a plurality of separate rectangular tanks having supporting elements extending from opposite walls thereof, said supporting elements being directly and detachably supported on said cross frame members so that said tanks will depend therefrom and thereby lower their centers of gravity, each of said tanks having mounted thereon a pump unit operated by an air motor, a source of compressed air mounted on said vehicle, an air supply manifold extending longitudinally of said chassis and connecting said source to said respective air motors for applying motive power to operate said pump units without ex posure of the liquid in the tanks to said compressed air, a plurality of hose reels mounted on said vehicle, each connected to the outlet of one of said pump units and having a dispensing spigot at the end thereof, wherebyany of the .various 10'" liquids in said tanks may be selectively dispensed.

'I. A service station liquid dispensing trailer dinally of said central portion of the trailer, a plurality of branch pipes connected to said manifold. each having a pressure regulating valve for supplying air under regulated pressure from said compressor unit to said motors, and a plurality of pairs of reels on opposite sides of said central portion of the trailer, supported at a height substantially that of the trailer axle, each pair of reels being connected to a single one of said tanks and being supported on opposite sides of said trailer, and means for selectively dispensing liquid under pressure from either or both of the reels of a corresponding pair of reels, whereby two vehicles located on opposite sides of said trailer may be simultaneously serviced.

8. A trailer tank vehicle having a low center of gravity, comprising a chassis having a pair of longitudinally extending frames with integrally formed goosenecks for raising the front portions of said frames to a level higher than that of the.

rear portions, a liquid storing tank mounted on said front portion, a plurality of separate tanks mounted transversely of said rear portion in a manner so as to depend between said frames and thereby lower their centers of gravity, a plurality of pairs of hose reels mounted on opposite sides of said trailer, a gasoline engine driven compressor mounted on the extreme end of said rear portion, and an air motor pump unit mounted on each of said tanks, each motivated by an air motor for supplying liquid under pressure to said hose reels, the hose reels of said respective pairs being located on opposite sides of said vehicle for selectively dispensing liquid under pressure from said respective tanks from either or both sides of said vehicle.

9. A portable service station comprising a vehicle having longitudinally extending, parallel disposed frames, a plurality of cross frames extending thereacross in spaced parallel relationship, a plurality of rectangular containers for storing different types of service fluids including lubricating oil and grease, each container having supporting strips integrally extending from opposite' side walls thereof and supported by the top flanges of a pair of adjoining cross frames so as to provide a readily detachable support for each individual tank and so as to support the tank in a manner so that a substantial portion of its height depends below said longitudinally extending frames to considerably lower their centers of gravity and thereby increase the mobility of said vehicle, each of said containers having an air motor pump unit mounted on the top thereof, a compressed air tank, an air intake manifold connected to said compressed air tank and extending longitudinally of said vehicle, a plurality of supply pipes, each including a pressure regulating valve for supplying regulated air pressure from said manifold to the air motors of said respective pump units, a plurality of pairs of hose reels having outlet spigots, a reel of each pair being disposed on opposite sides of said vehicle, the outlet of each of said air pumps being connected to a pair of hose reels to enable selecmouse tive dispensing of the same type of service liquid from the same tank from either or'both sides of the vehicle simultaneously to permit simultaneous servicing of two other vehicles located at opposite sides of the service station vehicle.

. 10. A trailer tank vehicle having mounted thereon a liquid fuel storage tank, a pair of hose reels with dispensing spigots at the ends thereof. said reels being mounted on opposite sides of said vehicle, a source of air under pressure also mounted on said vehicle, an air motor connected to said source, an air pump mechanically coupled to said motor, thereby preventing exposure of the liquid fuel to air from said source, a plurality of supply pipes connecting said tank to and to which said pump is connected so as to force liquid under pressure from said tank to said reels, said supply pipes including pressure regulating valves, shut-ofl valves for disconnecting said tank from sai pump, and a separate outlet and inlet. connec to said pipe whereby a flexible hose may be connected from an external source oi supplyto said inlet while said outlet may be connected by a second flexible hose to said fuel storage tank in a manner so that said pump will pump liquid from said external source of supply into said tank while the connections to said respective reels from said tank are closed.

- JOHN H. ADLER.

said reels l2 a summons crmn Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Date Number Name 330,853 Rosenileld Nov. 17, 1885 453,358 Maxon June 2, 1891 889,575 Bowser June 2, 1908 1,311,981 Lucius Aug. 5, 1919 1,497,575 Menge June 10, 1924 1,705,649 Scott Mar. 19, 1929 1,778,987 Cunningham Jan. 13, 1931 1,892,519 Schottgen Dec. 27, 1932 1,897,164 Endacott Feb. 14, 1933 2,053,840 Norquist et a1. Sept. 8, 1936 2,105,302 Thwaits Jan, 11, 1938 2,169,500 Reid 'Aug. 15, 1939 2,285,543 Thomas June 9, 1942 2,315,085 Churchward Mar. 30, 1943 2,325,355 Yost July 27, 1943 2,421,765 Taylor June 10, 1947 -FOREIGN PATENTS Number Country Date 35,111 Austria Nov. 10, 1908 

